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Version 8 Condition Aetiology Predisposing factors Symptoms Blepharitis (Inflammation of the lid margins) Anterior blepharitis (also known as Anterior Lid Margin Disease, ALMD) - bacterial (usually staphylococcal) caused by (1) direct infection, (2) reaction to staphylococcal exotoxin or (3) allergic response to staphylococcal antigen - seborrhoeic (disorder of the glands of Zeis and Moll) Posterior blepharitis (also known as Posterior Lid Margin Disease, PLMD) - Meibomian gland dysfunction not due to direct infection bacterial lipases break down Meibomian lipids Meibomian secretion becomes abnormal both chemically and physically Mixed anterior and posterior blepharitis All of these conditions are typically bilateral and chronic or relapsing Dry eye syndrome (KCS) present in: - 50% of people with staphylococcal blepharitis - 25-40% of people with seborrhoeic blepharitis Seborrheoic blepharitis - seborrhoeic dermatitis (for example, of the scalp) Posterior blepharitis - acne rosacea Anterior blepharitis (May be asymptomatic) Ocular discomfort, soreness, burning, itching Mild photophobia Symptoms of dry eye including blurred vision and contact lens intolerance Posterior blepharitis (May be asymptomatic) Ocular discomfort, soreness, burning, stinging Referee Evidence needed? Version 8 - stinging caused by tear film breakdown Blurred vision (variable) caused by abnormal tear film lipid Signs Anterior blepharitis (staphylococcal) Lid margin hyperaemia Lid margin swelling Crusting of anterior lid margin (scales around bases of lashes ‘collarettes’) Misdirection of lashes Loss of lashes (madarosis) Recurrent styes and (rarely) chalazia Conjunctival hyperaemia Aqueous tear deficiency Secondary signs include: punctate epithelial erosion over lower third of cornea; marginal keratitis; phlyctenulosis; neovascularisation and pannus; mild papillary conjunctivitis Anterior blepharitis (seborrhoeic) Lid margin hyperaemia Oily or greasy deposits on lid margins Conjunctival hyperaemia Aqueous tear deficiency Posterior blepharitis Thick and/or opaque secretion at Meibomian gland orifices Foam in the lower tear film meniscus (due to excess tear film lipid) Plugging of duct orifices with abnormal lipid leading to dilatation of glands and formation of microliths and chalazia Conjunctival hyperaemia Aqueous tear deficiency, unstable pre-corneal tear film Secondary signs include: punctate epithelial erosion over lower third of cornea; marginal keratitis; scarring; neovascularisation and pannus; mild papillary conjunctivitis Differential Allergy (e.g. to eye drops, eye diagnosis drop preservatives or cosmetics), dacryocystitis, stye, chalazion, parasites (e.g. Phthyris pubis infestation), preseptal cellulitis, herpes (simplex or zoster) Management by Optometrist NonLid hygiene is first line of pharmacological management regardless of type of blepharitis. This wipes away This reads OK. Evidence is needed re: effective cleaning agents. Version 8 bacteria and deposits from lid margins and mechanically expresses the lid glands - using diluted baby shampoo, sodium bicarbonate solution or Lid Care® solution with a swab or cotton bud, patient cleans lid margins (but not beyond the mucocutaneous junction) - carry out twice daily at first; reduce to once daily as condition improves - use firm pressure with swab or cotton bud so as to express glands Warm compresses to loosen collarettes and crusts Advise the avoidance of cosmetics, especially eye liner and mascara Treat seborrhoeic dermatitis and dandruff, which are disorders associated with skin yeasts, with medicated shampoos containing e.g. selenium sulphide or ketoconazole Advise patient to return/seek further help if symptoms persist Complete eradication of the blepharitis may not be possible, but long-term compliance with these measures should reduce symptoms and minimise the number and severity of relapses While there are many anecdotal papers recommending various solutions for lid hygiene including Johnson's baby shampoo, sodium bicarbonate, I-Scrub, OCuSoft, [1,2,3,4,5,6] the evidence base for the various cleaning agents is limited. In terms of experimental evidence, one study was found on rabbits which shows that baby shampoo causes more conjunctival oedema and hyereamia than I-Scrub (a commercial cleaning agent.[7] These authors then tested the effect of I – Scrub on patients without a control group. They found15/20 patients report that I-Scrub reduced itching and discomfort. [7] Another study was located which had sampled 26 patients with blepharitis and compared the effect of OCuSoft (a commercial cleaning agent) to Neutrogena soap over four months. Slit lamp examinations at six weeks and four months showed that 17/25 preferred the OCuSoft.[8] The authors then compared the OCuSoft with Johnson’s baby shampoo in a sub-group of 10 patients and found that 5/10 and 4/10 preferred the OCuSoft and baby shampoo respectively.[8] Finally a more recent prospective study compared clinical and biological tolerance and efficiency between a group of blepharitis sufferers who applied isotonic 0.1% zinc sulfate solution and another group which used natural selenium-rich thermal water (ie. La Roche-Posay thermal water).[9] Unfortunately, they do not state how frequently the solutions were applied. However, they report that both groups had no signs functional irritation signs, no potential conjunctive and cornea irritancy, lower lacrimal pH acidity rate, and preservation of the lacrimal lipid layer. In addition, the solutions were concluded to have corrected the pathogenic cycle efficiently because there was palpebral edge lipid reduction, meibonius glands orifice diameter reduction, and preservation of the saprophyte conjunctival flora. Overall as Chan and Franics (2004) argue, there is still a need for a prospective randomised controlled to find the most effective cleaning agent.[4] Version 8 1. Leibowitz HM, Capino D. Treatment of chronic blepharitis Archives of Ophthalmology 1988;106:720 2. Smith RE, Flowers CW, Chronic blepharitis: a review. the CLAO journal. 1995;21(3) 200-207 3. Shaw M. (2002) Recognising and managing blepharitis Ophthalmic Nursing: International Journal of Ophthalmic Nursing 2002;6(2):24-28 4. Chan DG, Francis IC. Comment on ‘Glaucoma from topical corticosteroids to the eyelids Clinical and Experimental Ophthalmology 2004; 32(6) 656-657. 5. Pettinger D. Sodium bicarbonate in the treatment of blepharitis. Clinical and Experimental Ophthalmology 2005; 33: 448. 6. Figueiro E, Chan DG, Francis IC. Response to ‘Sodium Bicarbonate in the treatment of blepharitis’ eyelids Clinical and Experimental Ophthalmology 2005; 33(4) 448-9 7. Polack FM, Goodman DF Experience with a new deterrgent lid scrub in the management of chronic blepharitis Archives of Ophthalmology 1988;106:219-720 8. Key JE A comparative study of eyelid cleaning regimens in hronic blepharitis the CLAO journal 1996; 22(3): 209-212 9. Sore G, Rougier A, Richard A, Pericoi M. Ocular tolerance and efficiency of two solutions applied to non-infectioua blepharitis European Journal of Dermatology 2002; 4(12)LXII-IV Pharmacological If infection is present, and after deposit removal: oc chloramphenicol bd; place in eyes or rub into lid margin with fingertip or oc polymyxin/bacitracin bd (apply as above) or gutt fusidic acid bd to eyes Consider prescribing a systemic tetracycline, such as Version 8 oxytetracycline, doxycycline or minocyclin. Such treatment will need to be continued for several weeks or months and the dosage may need to be varied from time to time. These drugs are contraindicated in pregnancy, lactation and in children under 12 years Management of aqueous tear deficiency, if also present: refer to Guideline on tear deficiency If marginal keratitis is present, refer to Guideline on marginal keratitis Management category B2: Alleviation/palliation: normally no referral. B1: initial management followed by routine referral if adequate trial (six weeks of therapy) does not produce sufficient response. Consider co-management with GP or Ophthalmologist Management by Ophthalmologist Oral drugs of the tetracycline family (contraindicated in pregnancy, lactation & children under 12 years; various adverse effects have been reported), or other systemic antibiotics